If a satellite orbits as close to the earth's surface as possible,

$A$ person whose mass is $100\, {kg}$ travels from Earth to Mars in a spaceship. Neglect all other objects in the sky and take acceleration due to gravity on the surface of the Earth and Mars as $10\, {m/s^2}$ and $4\, {m/s^2}$ respectively. Identify from the below figures,the curve that fits best for the weight of the passenger as a function of time.

For a satellite to orbit around the earth,which of the following must be true?

Three particles of mass $1 \, kg$ each are placed at $(0, 0)$,$(0, 0.2 \, m)$,and $(0.2 \, m, 0)$. What is the net gravitational force on the particle placed at the origin?

During the motion of a planet from perihelion to aphelion,the work done by the gravitational force of the sun on it is ...........

If the height of a satellite from the surface of the Earth is increased,then its